R version 2.15.2 (2012-10-26) -- "Trick or Treat"
Copyright (C) 2012 The R Foundation for Statistical Computing
ISBN 3-900051-07-0
Platform: i686-pc-linux-gnu (32-bit)

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> x <- c(2,1,2,2,3,2,4,2,1,1,1,1,3,2,1,2,2,1,1,1,1,2,2,2,1,1,1,1,2,2,1,2,2,1,2,1,2,2,1,1,1,2,1,1,1,2,1,1,2,2,2,2,3,2,1,1,2,1,1,2,3,2,2,2,2,2,2,1,2,2,2,2,1,2,1,3,2,3,1,1,2,1,1,2,3,1,2,1,2,3,2,2,2,2,2,2,1,2,2,2,2,1,1,2,3,1,2,2,3,2,2,1,2,1,1,2,1,1,1,3,1,1,1,1,1,1,1,1,1,1,2,1,2,2,2,4,2,2,1,1,1,1,1,2,1,2,1,1,2,2,3,1,1,3,3,2,1,1,1,2,3)
> par4 = 'Unknown'
> par3 = 'FALSE'
> par2 = 'red'
> par1 = ''
> xlab = 'x'
> main = 'Histogram 'sadness''
Error: unexpected symbol in "main = 'Histogram 'sadness"
Execution halted